$\sqrt{x^2}+4x-6$

$\frac{d}{dx}x^2-2xy+2y^2=5$

$\sec\left(x\right)\frac{dy}{dx}+\left(sec\left(x\right)\cot\left(x\right)\right)y=1$

$\sin^{2}\left(90-\theta\right)+\sin^{2}\left(\theta\right)$

$-8\left(-2j-6\right)$

$16x^2-128x+305$

$\left(8x^5+4x^3-7\right)-\left(11-x^3+5x^5\right)$